Thiophene hydrodesulfurization and diesel fuel hydrorefining activities of XMo6(S)/γ-Al2O3 and Ni-XMo6(S)/γ-Al2O3 (X = Al, Ga, In, Fe, Co, and Ni) catalysts

• Published in: Kinetics and catalysis Vol. 50; no. 2; pp. 220 - 227
• Main Authors: Tomina, N. N., Nikul’shin, P. A., Tsvetkov, V. S., Pimerzin, A. A.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01-03-2009
• Subjects: Catalysis; Chemistry; Chemistry and Materials Science; Physical Chemistry; NiMo; Thiophene; Polycyclic Aromatic Hydrocarbon; Heteropoly Compound; Hydrodesulfurization
• ISSN: 0023-1584; 1608-3210
• DOI: 10.1134/S0023158409020116

X
Mo
6
(S)/γ-Al
2
O
3
and Ni-
X
Mo
6
(S)/γ-Al
2
O
3
catalysts based on Anderson heteropoly compounds (HPCs), where
X
= Al, Ga, In, Fe, Co, and Ni, were synthesized. The nature of the precursor HPC determines the activity of the catalysts in thiophene hydrogenolysis and diesel fuel hydrorefining in a flow-through setup. The activity of Ni-
X
Mo
6
(S)/γ-Al
2
O
3
with
X
= Al, Ga, and In in diesel fuel dehydrosulfurization increases in the order Al < Ga < In. For catalysts in which the heteroatom is an element of the iron triad, the order of the increasing activities is Fe < Co < Ni. The highest activity in both reactions was observed for catalysts based on InMo
6
-HPC and NiMo
6
-HPC: the residual sulfur in the hydrogenizates obtained over them at 320°C was 2.5 times lower than over a conventional ammonium paramolybdate-based catalyst, whereas the degree of hydrogenation of polycyclic aromatic hydrocarbons (PAH) was 15–16 rel. % higher.